Colorimetry Research CR-300RH

The Colorimetry Research CR-300RH is a compact, ultra-high resolution spectroradiometer with a 2nm bandwidth and 0.8 nm/pixel optical resolution R&D grade / reference instrument.

  • ColourSpace Integration
  • Large 20+mm Spot Size
  • 2nm Spectral Bandwidth
  • ±0.3nm Spectral Accuracy
  • 0.05 to 230,000 cd/m2
  • Solid Machined Aluminium & Stainless Steel Construction
CR-300RH + Shipping Ex. VAT (Shipping included)


The Colorimetry Research CR-300RH is a compact, ultra-high resolution spectroradiometer with a 2nm bandwidth and 0.8nm/pixel optical resolution. This is a very high specification, and is for ultra critical colour applications.

The 2nm spectral bandwidth of the CR-300RH is a requirement of narrow bandwidth displays, such as laser based projection.

Uniquely, the CR-300H has a large 20+mm spot size, with small divergence angle, making it ideal for contact and non-contact measurement of all displays and projectors, and is designed for all display types, including projection and all luminous display technologies, in contact and non-contact modes.

The CR-300RH is of very rugged construction, made of machined aluminium and stainless steel, with all optical components fixed to ensure that no optical misalignment can occur, and weighs 2.5 pound (1.134kg).

All CR-300RH probes are calibrated using NIST traceable calibration standards at a colour temperature of 2856 Kelvins, using a laboratory grade scanning double monochromator and high accuracy filters of known transmittance and chromaticity. Essentially, no other spectroradiometers are used during manufacturing and Q.A. because none of them are as accurate as a laboratory grade scanning double monochromator.


  • Detector: CMOS image sensor, 512 pixels
  • Spectral Range: 380–780 nm
  • Spectral Bandwidth: 2 nm
  • Spectral Accuracy: ±0.3 nm
  • Spectral Resolution: 0.8 nm / pixel
  • Luminance Range: 0.05-230,000 cd/m2
  • Luminance Accuracy: ±2 % (measured with NIST traceable 2856K light source, at 1.7 cd/m2)
  • Luminance Repeatability: ≤1 % (measured with NIST traceable 2856K light source, at 1.7 cd/m2)
  • Chromaticity Accuracy: ±0.0015 x,y (measured with NIST traceable 2856K light source, at 1.7 cd/m2)
  • Chromaticity Repeatability: 0.0005 x,y (measured with NIST traceable 2856K light source, at 1.7 cd/m2)
  • Polarization error: ≤0.5%
  • Digital Resolution: 16 bits
  • Objective Lens: 50 mm, 60 mm, 75 mm, 100 mm (50 mm is the standard lens - all others are special order)
  • Measurement Spot Size: 20mm at end of hood; 22.6mm at 100mm from hood
  • Spot Size Calculation: = 20mm +0.026*distance to object for 50mm lens
  • Custom Synchronisation: 10 - 10000 Hz
  • Exposure Time Range: 0.04 to 30 seconds
  • Power Requirements: 5V, 120 mA (600 mW) via USB 2.0
  • Interface: USB 2.0
  • Weight: 1.134 Kg

The CR-300RH is an R&D grade / reference instrument, providing a very high level of accuracy, enabling pre-calibration of Tristimulus probes for very accurate final profiling. Designed specifically for the professional calibrator, the CR-300RH has a large spot size combined with a small divergence angle, that keeps the measurement spot size within desired dimensions for distance calibration, as with projectors.

The rubber hood allows the probe to be positioned against screen surfaces, providing a shield for for stray ambient light.


  • USB 2.0 Cable
  • Universal Mounting Bar
  • Rubber Hood
  • Hard Carry Case (specify if 2nd probe being ordered)
  • Dual meter mount (standard with 2nd probe)
  • Cosine/Illuminance Receptor (optional ~ £350)
  • ND Filters (optional ~ £350 each)
  • Filter holder (optional ~ £115)

ND filters and Cosine Receptors must be calibrated with the unit. If a ND filter or Cosine Receptor is purchased after the unit has shipped from the factory the unit must be shipped back to the factory in order to get the added accessory properly calibrated with the unit.


The CR-300RH or CR-300 should be factory recalibrated/re-certified every year to two years, depending on usage and storage, or when obvious issue are found (after physical shock to the probe for example).
Cost is $750 USD, plus shipping.
Contact Colorimetry Research to schedule recalibration/re-certification.

Colorimetry Research Dual Probe Mount
Dual Probe Mount
CRI Android App

The CRI App will run on any Android phone/tablet, and will connect and control Colorimetry Research meters using a USB cable. All CR meters such as CR-100, CR-250, CR-300, etc. are low power devices and can be directly powered from the phone/tablet.

Download on Play Store


An alternate to the CR-300RH is the CR-300, for use with optional VO-203 horizontal & vertical rotatable Viewing Optics.

The CR-300 also comes with a removable Rubber Hood for contact use, and provides the same sensitivity and capabilities as the CR-300RH.

CR-300 & VO-203 + Shipping Ex. VAT (Shipping included)
Colorimetry Research CR-300
CR-300 & VO-203
Colorimetry Research Alternative Probes

Light Illusion can also supply any Colorimetry Research probe, or optional accessories.

Contact Light Illusion directly for further information.

ColourSpace Integration

As with all probes, CR-300 operation and function is controlled via the Probe Options menu, accessed via the Profiling window.

The CR-300 has options that are directly associated with the probe - Speed options, which control the maximum auto exposure time, Sync Frequency, which controls the synchronisation of the probe with the display's refresh rate, and probe Calibration Settings (Matrix pre-sets) - as well as generic probe settings, such as Extra Delay Time, Probe Matching, Probe Offset, etc.

CR-250 and CR-300

Calibration Settings

Calibration Settings provides generic probe settings, and Colour Matching Presets.

Colour Matching Presets

The Drop-down menu provides access to any Colour Matching Functions held within the CR-300.
Colour Matching Functions are aimed at correcting for Metameric colour failure.

Average Low Light

Average Low Light is a probe generic option, that averages multiple readings in low-light situations using an advanced algorithm built into ColourSpace. The algorithm varies based on the probe in use to provide the best possible results.


Speed sets the exposure time.
1=Slow: 30 sec exposure + 30 sec dark measurement
2=Normal: 7.5 sec exposure + 7.5 sec dark measurement
3=Fast: 3.75 sec exposure + 3.75 sec dark measurement
4=2xFast: 1.875 sec exposure + 1.875 sec dark measurement

Sync Frequency

Sync Frequency defines the sync frequency of the probe, with None being the default, although Manual can be used if the refresh rate of the display is known. Auto is not used.

Extra Delay Time

Extra Delay sets a delay time after the patch has changed before probe measurement starts, and can be set automatically via the Auto button, and manages signal path delays in the image pipeline.
When using the Auto option, Average Low Light is normally not used.

Probe Matching

Probe Matching is really unnecessary with the CR-300, as it is a Spectroradiometer.
The options is provided on a Why Not basis...

Probe Offset

Probe Offset enables a user to manually enter offset values for different probes/display combinations.
Perceptual Colour Match is a preferable approach.